Question: Are Peace of Mind and Happiness the Same?
I am not clear about a thing. In Krishna Consciousness are happiness and peace of mind the same thing? Or are they different?
Answer: Similar But Different
They are almost the same, but they are slightly different as explained in the Bhagavad-gita:
nāsti buddhir ayuktasya
na cāyuktasya bhāvanā
na cābhāvayataḥ śāntir
aśāntasya kutaḥ sukham
"One who is not connected with the Supreme [in Krishna consciousness] can have neither transcendental intelligence nor a steady mind, without which there is no possibility of peace. And how can there be any happiness without peace?"
In other words, a peaceful state of mind is a prerequisite of happiness. It is required that one have a peaceful mind in order to be happy.